Prior to utilization of methane in gas engine, a 3500 ppm of H2S in biogas need to be treated with a cross-flow absorber. The average biogas flow rate of 45 m3/s is scrubbed using water at a pressure of 110 atm and 20\\\\deg C. According to Environmental Quality (Clean Air) Regulation 2014, it is allowable to reduce the final H2S concentration to 5% of total inlet concentration. Estimate the required water flow rate for the scrubbing process.